JP5829725B1 - Lift device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle lift device capable of easily inserting a vehicle receiver into a lower part of a low floor vehicle with a light operating force. SOLUTION: A pair of left and right lifting platforms 10 installed on the left and right of a maintenance work site A of a target vehicle 1 and two front and rear positions of a lifting platform 11 included in each lifting platform 10 are supported and lifted together with the lifting platform 11. In the vehicle lift device 100 having a pair of front and rear swing arms 20 and 50 that are enabled, each swing arm 20 and 50 is composed of link coupling bodies 20A and 50A in which a plurality of links are coupled, and link coupling. The base links 21 and 51 constituting the bodies 20A and 50A are fixed to the lifting platform 11 of the lifting platform 10, and the tip links 22 and 52 constituting the link coupling bodies 20 and 50A are provided with vehicle receivers 30 and 60. [Selection] Figure 1

Description

  The present invention relates to a vehicle lift device.

  Conventionally, as a lift device for a vehicle, as described in Patent Document 1, a pair of left and right lifting platforms installed on the left and right of a maintenance work site of a target vehicle, and two front and rear positions of the lifting platform included in each lifting platform are supported. In addition, there is one having a pair of front and rear slide arms which can be raised together with the lifting platform.

Each slide arm employed in the lift device for a vehicle described in Patent Document 1 includes a square-shaped base arm pivotally supported by a support shaft provided on a lifting platform of each lifting platform, and a rectangular section of the base arm. A square cross-section intermediate arm inserted in a telescopic manner and a square cross-section tip arm inserted in a quadrangular cross section of the intermediate arm in a telescopic manner. Prepare.

  Each slide arm swivels the base arm around the support shaft of the lifting platform, and linearly slides each arm of the base arm, the intermediate arm, and the tip arm to expand and contract, so that the receiving arm that the tip arm has is received. It can be positioned at the lift point defined at the bottom of the vehicle. In this state, the vehicle can be lifted up by raising the slide arms together with the elevators.

JP 2002-128482 A

The vehicle lift device described in Patent Document 1 has the following problems.
(1) The slide arm linearly slides and expands and contracts each arm of the base arm, the intermediate arm, and the tip arm, and when positioning the catcher provided on the tip arm at the lower lift point of the vehicle , Slide each arm toward the lower part of the vehicle on a straight line connecting the support shaft provided on the lifting platform of the lifting platform and the lift point of the lower part of the vehicle (on the straight line oblique to the longitudinal direction of the vehicle) There is a need. Therefore, when trying to insert a plurality of arms including the tip arm of the slide arm into the lower part of the vehicle, in a vehicle with a low vehicle height and a wide vehicle width, the plurality of arms are in contact with the vehicle body. The receipt may not be positioned at the lift point at the bottom of the vehicle.

  (2) The slide arm is configured such that the intermediate arm is inserted into the square cross section of the base arm, and the distal end arm is inserted into the square cross section of the intermediate arm, and the contact area associated with the slide of each arm is large. Therefore, each of these arms is slid in a state in which the arm weight on the distal end side is applied to such a contact surface between the arms, and a large operating force is required.

  (3) The slide arm inserts the intermediate arm into the square cross section of the base arm, and inserts the tip arm into the square cross section of the intermediate arm, and has a small cross section inside the large cross section base arm. The intermediate arm and the distal arm are inserted in such a manner as to be stored in order, and it is necessary to provide each arm with a cross-sectional dimension and a plate thickness for ensuring a certain strength, and it is difficult to reduce the size.

  (4) In the slide arm, the weight of the vehicle when the vehicle is lifted up acts on the contact surface of each arm and stops free sliding thereof. The free expansion and contraction of the slide arm cannot be locked easily and reliably.

  An object of the present invention is to provide a vehicle lift device in which a vehicle support can be easily inserted into a lower part of a low floor vehicle with a light operating force.

  Another object of the present invention is to reduce the size of a swing arm provided with a vehicle support in a vehicle lift device.

  Another object of the present invention is to enable easy and reliable locking of a swing arm provided with a vehicle support in a vehicle lift device.

The invention according to claim 1 is supported by each of a pair of left and right lifting platforms installed on the left and right of the maintenance work site of the target vehicle, and two front and rear positions of the lifting platform included in each lifting platform, and can be lifted and lowered together with the lifting platform. In the vehicle lift apparatus having a pair of front and rear swing arms, each swing arm is composed of a link coupling body in which a plurality of links are coupled, and the base link constituting the link coupling body is a lifting platform of the lifting platform The front end link that is fixed to the link connecting body includes a vehicle support, and the link connecting body includes a base link, a front end link, an intermediate link, a first link, a second link, a first sublink, It consists of 7 links of the 2nd sublink, the length of each link of the base link, the tip link and the middle link is the same, and the length of each link of the 1st link and the 1st sublink is the same The lengths of the links of the second link and the second sublink are made the same, and the base link, the first link, the intermediate link, and the first sublink form a first parallelogram link mechanism. In addition to being connected, the intermediate link, the second link, the tip link, and the second sub-link are connected so as to form a second parallelogram link mechanism .

According to a second aspect of the present invention, in the first aspect of the invention according to the first aspect, the link coupling body is configured such that a free displacement of the first parallelogram link mechanism and a free displacement of the second parallelogram link mechanism. Arm locking means for locking at the same time is provided.

The invention according to claim 3 is the invention according to claim 2, wherein the arm lock means further comprises:
A first stationary element provided on the second sub-link so as to be able to advance and retreat and a first engagement element provided fixedly on the first sub-link can be engaged with each other, and a second sub-link provided so as to be able to advance and retract. The two stop elements and the second engagement element fixedly provided on the intermediate link can be engaged with each other, and the first operation element is engaged with the first engagement element by the lock operation part provided on the second sub link. At the same time, the second stationary element is engaged with the second engagement element so that the free displacement of the first parallelogram link mechanism and the free displacement of the second parallelogram link mechanism can be locked simultaneously. It is a thing.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects , the front end link of the link coupling body can be displaced only in the longitudinal direction and the vehicle width direction of the vehicle, By displacing the link from the outside of the vehicle toward the vehicle width direction, it is inserted into the lower part of the tire from the side of the lower part of the tire of the vehicle, and with respect to the planned lift part at the front and rear two positions of the lower part of the tire A vehicle receiver positioned on the tip link, and the vehicle receiver positioned with respect to the planned lift portion comes into contact with the front and rear positions of the lower part of the tire from below as the lift of the lift base is raised. The vehicle can be lifted up .

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the vehicle support provided in the tip end link of the link connector has the tip end link in the vehicle width direction from the outside of the vehicle. The lift is composed of front and rear levers which are inserted into the lower part of the tire from the side of the lower part of the tire of the vehicle and are positioned with respect to the planned lift part which is two positions of the front and rear of the lower part of the tire. The front and rear levers positioned with respect to the planned portion are adapted to allow the vehicle to be lifted up by coming into contact with the front and rear two positions of the lower part of the tire from below as the lift of the lift base is raised .

The invention according to claim 6 is the invention according to any one of claims 1 to 3 , further comprising: a vehicle support provided at a tip link of the link connector is inserted into the lower part of the vehicle from the side of the lower part of the vehicle. In this way, it is made up of a receiver that comes into contact with the lift point defined at the lower part of the vehicle from below .

(Claim 1)
(a) The swing arm swings so as to give a free movement trajectory to the vehicle holder included in the distal end link by the rotation of each of the plurality of links constituting the link coupling body. Can be positioned at the planned lift part (two front and rear positions of the lower part of the vehicle tire, or a lift point determined at the lower part of the vehicle). Therefore, by imparting an appropriate rotation angle to each link and swinging the swing arm, the distal end link is displaced toward the vehicle, and at least the link on the distal end side excluding at least the base link (the distal end portion) of the link connection body. The vehicle support included in the link, the intermediate link), and the tip link can be inserted into the lower part of the vehicle. Or only the vehicle holder with which a front-end | tip part link is provided can also be inserted in the lower part of a vehicle. As a result, even in a vehicle having a low vehicle height and a wide vehicle width, the base support or each link including the base link is not brought into contact with the vehicle body, and the vehicle support is positioned at the planned lift portion defined at the lower part of the vehicle. The vehicle can be lifted up.

  (b) In the swing arm, each link constituting the link coupling body is pivotally supported by the coupling shaft, and each link is rotated around the coupling shaft so as to be able to swing, and the contact area accompanying the rotation of each link is small. Therefore, the swing arm can be swung with a light operating force, and the vehicle support can be easily inserted into the planned lift portion defined in the lower part of the vehicle.

  (c) In the swing arm, each link is connected via a connecting shaft to form a link connection body, and the other link is not stored in the cross section of one link. Thereby, it is possible to ensure a certain strength for each link while reducing the cross-sectional dimension of each link. Moreover, the intensity | strength with respect to a torsion is securable by comprising each link with a round pipe. Therefore, it is possible to reduce the size of the swing arm provided with the vehicle support.

(d) The link connecting body constituting the swing arm is configured to include a first parallelogram link mechanism and a second parallelogram link mechanism, and an intermediate link of the first parallelogram link mechanism; The intermediate link of the second parallelogram link mechanism is shared, the base link of the first parallelogram link mechanism is fixed to the lift base of the lift base, and the tip link of the second parallelogram link is fixed A vehicle receiver is provided. Thereby, no matter how the swing arm swings, the distal end link provided with the vehicle support moves in parallel with the base link fixed to the lifting platform of the lifting platform. Therefore, if the orientation of the vehicle support provided for the tip link is previously arranged in parallel or orthogonal to the longitudinal direction of the vehicle (front-rear direction of the vehicle) stopped at the maintenance work position of the maintenance work place, No matter how the swing arm swings, the vehicle support is displaced only in the longitudinal direction and the vehicle width direction of the vehicle. For example, when the swing arm is swung by the manual operation force of the operator holding the tip link, the vehicle support is easily positioned at an appropriate position along the longitudinal direction of the vehicle and at an appropriate position along the vehicle width direction of the vehicle. Easily positioned. As a result, the vehicle receiver can be reliably and easily positioned on the planned lift portion defined in the lower part of the vehicle.

(Claim 2 )
(e) The link coupling body constituting the swing arm has arm lock means for locking the free displacement of the first parallelogram link mechanism and for locking the free displacement of the second parallelogram link mechanism. . Thus, when the vehicle support provided in the tip end link of the swing arm is positioned at the planned lift portion defined at the lower part of the vehicle, the arm lock means is provided with the first parallelogram link mechanism and the second parallelogram link mechanism. As a result, the free swing of the swing arm can be locked easily and reliably, and the vehicle support can be easily fixed to the planned lift portion defined at the lower part of the vehicle.

(Claim 3 )
(f) The arm lock means is capable of meshing the first stationary member provided to be able to advance and retreat in the second sub-link and the first engagement member fixed to the first sub-link, and the second sub-link. The second stationary element provided on the link so as to be able to advance and retreat, and the second engaging element provided fixedly on the intermediate link can be engaged with each other, and the first stationary element is provided by the lock operation part provided on the second sub-link. The first engaging element is engaged with the second stationary element, and the second engaging element is engaged with the second engaging element. The free displacement of the first parallelogram link mechanism and the free displacement of the second parallelogram link mechanism are obtained. Make lockable at the same time. Thereby, the compact structure allows the first parallelogram link mechanism and the second parallelogram link mechanism to be easily and simultaneously locked at the same time, regardless of the swing position of the swing arm. Further, the free displacement of the first parallelogram link mechanism and the second parallelogram link mechanism can be easily and simultaneously locked by a simple operation such as rotating the cam surface by a single lock operation portion.

(Claim 4 )
(g) The distal ends of the arms supported by the lifting platforms included in the left and right lifting platforms are displaced only in the longitudinal direction and the vehicle width direction of the vehicle. Therefore, each vehicle support provided at the tip of each arm is easily positioned at an appropriate position along the longitudinal direction of the vehicle, and is easily positioned at an appropriate position along the vehicle width direction of the vehicle. Thereby, each vehicle holder can be reliably and easily positioned at a planned lift portion (two positions at the front and rear of the lower portion of the vehicle tire) defined at the lower portion of the vehicle. Thereafter, by raising the elevators of the elevators, the arms that rise with the elevators can lift the vehicle through the vehicle support.

(Claim 5 )
(h) The vehicle support provided in the front end link of the link connecting body constituting the swing arm is made up of front and rear levers that are in contact with the two lower and lower positions of the vehicle tire from below. Since the vehicle lift device of the present invention can swing the swing arm to displace the front end link from the outside of the vehicle toward the vehicle width direction, the front and rear levers of the vehicle support included in the front end link are provided. It is made to approach in the axle direction from the side of the lower part of the tire, and the two front and rear positions of the lower part of the tire can be sandwiched and lifted by these two levers. There is no need to look into the lower part of the vehicle and look for the lift point so that the vehicle support is aligned with the lift point defined at the lower part of the vehicle.

(Claim 6 )
(i) The vehicle support provided on the tip link of the link connecting body constituting the swing arm is made up of a receiver that comes into contact with the lift point defined at the lower part of the vehicle from below. Since the vehicle lift device of the present invention can be positioned by inserting the vehicle receiver into the lower part of the vehicle even in a vehicle having a low vehicle height and a wide vehicle width, the receipt of the vehicle receiver can be securely and securely attached to the lift point at the lower part of the vehicle. It can be easily positioned and lifted up.

FIG. 1 is a schematic diagram showing a vehicle lift device. FIG. 2 is a schematic diagram showing a lift-up start stage of the vehicle lift device. FIG. 3 is a schematic diagram showing a lift-up completion stage of the vehicle lift device. FIG. 4 is a plan view showing the swing arm. FIG. 5 is a side view showing the swing arm. FIG. 6 is a plan view showing first and second parallelogram link mechanisms of the swing arm. FIG. 7 is a plan view showing the arm lock means. FIG. 8 is a sectional view showing the arm lock means.

  The vehicle lift device 100 shown in FIGS. 1 to 3 includes a pair of left and right lifting platforms 10 and 10 installed on the left and right of a maintenance work site A having a maintenance work position where the maintenance target vehicle 1 is introduced and stopped. Have. Each lifting platform 10 includes a lifting platform 11 that is erected on the floor surface of the maintenance workshop A and that is lifted and lowered by a driving means (not shown) (hydraulic cylinder, electric motor, etc.). In addition, let the direction along the vehicle width direction orthogonal to the front-back direction of the vehicle 1 introduce | transduced and stopped at the maintenance work position of the maintenance work place A be a left-right direction.

  The vehicle lift device 100 includes a pair of front and rear swing arms 20 and 50 supported at two front and rear positions of a lifting platform 11 provided in each lifting platform 10. The swing arms 20 and 50 can be moved up and down together with the lifting platform 11 when the lifting platform 11 is lifted and lowered. The direction along the longitudinal direction of the vehicle 1 along the front-rear direction of the vehicle 1 introduced and stopped at the maintenance work position of the maintenance work site A is defined as the front-rear direction.

  Each swing arm 20 (50) is composed of a link connecting body 20A (50A) in which a plurality of links are connected, and the base link 21 (51) constituting the link connecting body 20A (50A) is connected to the lifting platform 11 of the lifting platform 10. The distal end link 22 (52) that is fixed and constitutes the link connector 20A (50A) includes the vehicle support 30 (60).

  As shown in FIG. 4, the vehicle receiver 30 (60) included in the distal end link 22 (52) of the link connector 20 </ b> A (50 </ b> A) includes an attachment bracket 31 (61) fixed to the distal end link 22 (52). The front and rear levers 31F and 31R (61F and 61R) are inserted into and fixed to mounting holes provided in the mounting bracket 31. The front and rear levers 31F and 31R (61F and 61R) are in contact with the two front and rear positions of the lower portion (lower half) of the front tire 2F (rear tire 2R) of the vehicle 1 from below. The mounting bracket 31 (61) is for the front lever 31F (front lever 61F) so that the insertion position of the levers 31F, 31R (61F, 61R) can be selected according to the tire diameter of the vehicle 1. It is provided with at least one mounting hole and two or more mounting holes for the rear lever 31R (rear lever 61R).

  As shown in FIGS. 1 and 4 to 6, the link connector 20A (50A) includes a base link 21 (51), a tip link 22 (52), an intermediate link 23 (53), and a first link 24 (54). ), The second link 25 (55), the first sublink 24S (54S), and the second sublink 25S (55S). The lengths of the links of the base link 21 (51), the tip link 22 (52), and the intermediate link 23 (53) are the same, and the first link 24 (54) and the first sublink 24S (54S) The lengths of the links are the same, and the lengths of the links of the second link 25 (55) and the second sublink 25S (55S) are the same. However, the length of the first link 24 and the first sub-link 24S of the swing arm 20 and the first link 54 of the swing arm 50 are prevented in order to prevent vibration or the like when the front swing arm 20 and the rear swing arm 50 are moved up and down. The length of the first sub link 54S is different from the length of the second link 25 and the second sub link 25S of the swing arm 20, and the length of the second link 55 and the second sub link 55S of the swing arm 50 is different. I'm making things.

  As shown in FIG. 6, the link link 20A (substantially the same as 50A) includes a base link 21, a first link 24, an intermediate link 23, and a first sub-link 24S as a first parallelogram link mechanism. The intermediate links 23, the second links 25, the tip links 22, and the second sublinks 25S form a second parallelogram link mechanism L2 while being connected by the connecting shafts P1 to P4 so as to form L1. Thus, they are connected by connecting shafts P2, P5, P6, and P3. At this time, the orientation of the vehicle support 30 provided on the distal end link 22 is arranged in advance or in parallel with the longitudinal direction (front-rear direction of the vehicle) of the vehicle 1 stopped at the maintenance work position of the maintenance work site A. Shall.

  The link connector 20A (50A is substantially the same) can form each link 21-25, 24S, 25S by a flat plate material or a pipe material. In this embodiment, the first link 24, the second link 25, The first sublink 24S and the second sublink 25S are formed of a round pipe material.

  In other words, the link connecting body 20A constituting the swing arm 20 (the link connecting body 50A constituting the swing arm 50 is substantially the same) includes the first parallelogram link mechanism L1 and the second parallelogram link mechanism L2. The intermediate link 23 of the first parallelogram link mechanism L1 and the intermediate link 23 of the second parallelogram link mechanism L2 are used in common, and the first parallelogram link mechanism L1. The base link 21 is fixed to the lifting platform 11 of the lifting platform 10, and the vehicle support 30 is provided on the distal end link 22 of the second parallelogram link mechanism L2. Thereby, no matter how the swing arm 20 swings, the distal end link 22 provided with the vehicle support 30 always moves in parallel with the base link 21 fixed to the lifting platform 11 of the lifting platform 10. Therefore, if the orientation of the vehicle support 30 provided at the tip link 22 is previously arranged in parallel or orthogonal to the longitudinal direction of the vehicle (front-rear direction of the vehicle) stopped at the maintenance work position of the maintenance work place A. The vehicle receiver 30 is displaced only in the longitudinal direction and the vehicle width direction of the vehicle, no matter how the swing arm 20 swings. Therefore, when the swing arm 20 is swung by the manual operation force of the operator holding the tip link 22, the vehicle support 30 is easily positioned at an appropriate position along the longitudinal direction of the vehicle and in the vehicle width direction of the vehicle. It is easily positioned at an appropriate position along. As a result, the front and rear levers 31F and 31R of the vehicle arm 30 of the swing arm 20 are lifted from the standby position shown in FIG. 1 as shown in the lift-up start stage shown in FIG. (In this embodiment, it can be reliably and easily positioned at the front and rear two positions of the lower portion of the tire 2F of the vehicle 1) (FIG. 2).

  The vehicle lift device 100 positions the vehicle receivers 30 and 60 of the front and rear swing arms 20 and 50 supported by the elevators 11 included in the left and right elevators 10 in the above-described lift-up start stage (FIG. 2). After that, by raising the lifting platform 11 of each lifting platform 10, the swing arms 20 and 50 that are lifted together with the lifting platform 11 lift the vehicle 1 through the vehicle receivers 30 and 60 to complete the lift-up stage. (FIG. 3).

Therefore, the vehicle lift device 100 has the following effects.
(a) The swing arm 20 (the swing arm 50 is substantially the same) is a vehicle receiver provided in the tip link 22 by the rotation of each of the plurality of links 21 to 25, 24S, and 25S constituting the link coupling body 20A. The vehicle 30 is swung to give a free movement trajectory to the vehicle 30 and the vehicle holder 30 is set at the lower part of the vehicle 1 at the planned lift portion (front and rear two positions of the tires 2F and 2R of the vehicle 1 or at the lower part of the vehicle 1). It can be positioned at a defined lift point). Accordingly, by imparting an appropriate rotation angle to each of the links 21 to 25, 24S, and 25S and swinging the swing arm 20, the distal end link 22 is displaced toward the vehicle 1, and at least of the link coupling body 20A. The front side link (the front end link 22 and the intermediate link 23) excluding the base link 21 and the vehicle support 30 provided in the front end link 22 can be inserted into the lower portion of the vehicle 1. Alternatively, only the vehicle receiver 30 included in the tip end link 22 can be inserted into the lower portion of the vehicle 1. As a result, even in the vehicle 1 having a low vehicle height and a wide vehicle width, the vehicle support 30 can be mounted on the vehicle without bringing the base link 21 or the links 21 to 25, 24S, 25S including the base link 21 into contact with the vehicle body. The vehicle 1 can be lifted up by being positioned at a planned lift portion defined at a lower portion of the vehicle 1.

  (b) In the swing arm 20, the links 21 to 25, 24S and 25S constituting the link connecting body 20A are pivotally supported by the connecting shafts P1 to P6, and the links 21 to 25, 24S and 25S are connected to the connecting shafts P1 to P6. It can be swung by rotating around, and the contact area associated with the rotation of each link 21-25, 24S, 25S is small. Therefore, the swing arm 20 can be swung with a light operating force, and the vehicle support 30 can be easily inserted into the planned lift portion defined in the lower portion of the vehicle 1.

  (c) The swing arm 20 is configured such that the links 21 to 25, 24S, and 25S are connected via connecting shafts P1 to P6 to form a link connecting body 20A. Other links are included in the cross section of one link. Is not stored. Thereby, fixed intensity | strength can be ensured to each link 21-25, 24S, 25S, reducing the cross-sectional dimension of each link 21-25, 24S, 25S. Moreover, the intensity | strength with respect to a torsion is securable by comprising each link 21-25, 24S, 25S with a round pipe. Therefore, the swing arm 20 including the vehicle receiver 30 can be downsized.

  (d) The link connecting body 20A constituting the swing arm 20 includes the first parallelogram link mechanism L1 and the second parallelogram link mechanism L2, and the first parallelogram link mechanism L1. The intermediate link 23 of the second parallelogram link mechanism L2 and the intermediate link 23 of the second parallelogram link mechanism L2, and the base link 21 of the first parallelogram link mechanism L1 is fixed to the elevator platform 11 of the elevator platform 10, The vehicle support 30 is provided on the distal end link 22 of the second parallelogram link. Therefore, no matter how the swing arm 20 swings, the tip link 22 is always translated relative to the base link 21 fixed to the lifting platform 11 of the lifting platform 10, and the vehicle holder 30 provided on the distal link 22 is provided. Is displaced only in the longitudinal direction and the vehicle width direction of the vehicle 1, and as a result, the vehicle receiver 30 can be reliably and easily positioned from the outside of the vehicle 1 to the planned lift portion defined in the lower portion of the vehicle 1.

  (e) From the front and rear levers 31F and 31R that the vehicle support 30 provided on the distal end link 22 of the link coupling body 20A constituting the swing arm 20 comes into contact with the front and rear two positions of the lower part of the tire 2F of the vehicle 1 from below. To be. Since the vehicle lift device 100 of the present invention can swing the swing arm 20 to displace the front end link 22 from the outside of the vehicle 1 toward the vehicle width direction, the vehicle support provided in the front end link 22 is provided. The front and rear levers 31F and 31R of 30 can enter the axle direction from the side of the lower portion of the tire 2F, and the two front and rear positions of the lower portion of the tire 2F can be sandwiched and lifted by these two levers 31F and 31R. There is no need to look into the lower part of the vehicle 1 so as to align the vehicle receiver 30 with the lift point defined at the lower part of the vehicle 1 and to find the lift point.

  Further, in the lift device 100 for a vehicle, the link connecting body 20A constituting the swing arm 20 (the link connecting body 50A constituting the swing arm 50 is substantially the same) is free of the first parallelogram link mechanism L1. Arm locking means 40 (70) for locking the displacement and for locking the free displacement of the second parallelogram linkage L2 is provided.

  The arm lock means 40 (70 is substantially the same) is configured by the following i to iii as shown in FIGS.

  i. The first stop 41A provided in the second sub-link 25S so as to be able to advance and retreat, and the first engagement element 41B fixedly provided in the first sub-link 24S can be engaged with each other.

  ii. The second stop 42A provided in the second sub link 25S so as to be able to advance and retreat, and the second engaging element 42B fixedly provided in the intermediate link 23 can be engaged with each other.

  iii. With the lock operating portion 43 provided on the second sub link 25S, the first stop 41A is engaged with the first engagement element 41B, and the second stop 42A is engaged with the second engagement element 42B. The free displacement of the first parallelogram link mechanism L1 and the free displacement of the second parallelogram link mechanism L2 are simultaneously locked.

  That is, the central axis of the connecting shaft P3 connecting the three members of the end plate E integrated with the intermediate link 23, the end plate F integrated with the first sub-link 24S, and the end tube G integrated with the second sub-link 25S. Around the arcuate external teeth 1b of the first engaging element 41B fixedly provided on the end plate F integrated with the first sub-link 24S, and on the end plate E fixedly provided on the intermediate link 23. The arcuate external teeth 2b of the two engaging elements 42B are arranged side by side in the vertical direction (FIG. 8). The connecting shaft P3 passes through the upper plate G1 and the lower plate G2 of the end cylinder G integrated with the second sublink 25S, the end plate E of the intermediate link 23, and the end plate F of the first sublink 24S. It is held by a fixed body 44 screwed to the upper plate G1. Between the end plate E of the intermediate link 23 and the end plate F of the first sub-link 24S, the above-described first engaging element 41B and second engaging element 42B screwed to the end plates E and F are provided. A space for accommodation is formed, and a collar 45 inserted around the connection axis P3 is disposed.

  The end cylinder G is bolted to a cover plate K welded to the second sub-link 25S. Inside the end cylinder G, a first stop 41A and a second stop 42A are juxtaposed vertically. Is contained. The first stationary element 41A is pressed by an elastic spring 41S supported on the back surface of the cover plate K so that the inner teeth 1a can be engaged with the outer teeth 1b of the first engaging element 41B facing each other. The second stationary element 42A is pressed so as to be able to mesh with the outer teeth 2b of the second engaging element 42B facing the inner teeth 2a by a spring 42S supported on the back surface of the cover plate K (FIG. 8).

  On the other hand, in the lock operation portion 43, the cam surface 43A provided at the distal end abuts on the end surface of the end nut 46 screwed to the opening end of the hollow second sub link 25S, and the distal end portion of the lock operation portion 43 The tension rod 47 pin-connected to the second sub link 25S is inserted into the hollow portion. The aforementioned first stop element in which a small-diameter connecting pin 49 provided on a connecting plate 48 connected to the insertion end of the pulling rod 47 by a split pin 47A is juxtaposed vertically inside the end cylinder G of the second sublink 25S. 41A and the second stationary element 42A are engaged in long holes. When the cam surface 43A of the lock operation portion 43 is in the lock operation position as shown in FIG. 7, the stationary elements 41A and 42A mesh with the engagement elements 41B and 42B by the elastic force of the elastic springs 41S and 42S, The free displacement of the first parallelogram link mechanism L1 and the free displacement of the second parallelogram link mechanism L2 are simultaneously locked. When the cam surface 43A of the lock operation portion 43 is rotated 90 degrees from the lock operation position shown in FIG. 7 on the end surface of the end nut 46 and is changed to the unlock position, the lock operation portion 43 is connected to the pulling rod 47. After the plate 48 is pulled and the connecting pins 49 provided on the connecting plate 48 play and move within the long holes of the respective retainers 41A and 42A by a certain distance, the springs 41S and 42S are compressed while the retainers 41A and 41S are compressed. 42A is pulled away from the meshing position with the corresponding engagement elements 41B and 42B, so that the first and second parallelogram link mechanisms L1 and L2 can be freely displaced.

  Therefore, the vehicle lift device 100 has the following effects in addition to the effects (a) to (e) described above.

  (f) When the vehicle support 30 provided on the tip end link 21 of the swing arm 20 is positioned at the planned lift portion defined at the lower part of the vehicle 1, the arm lock means 40 is connected to the first parallelogram link mechanism L1 and the second As a result, the free swing of the swing arm 20 can be locked easily and reliably, and the vehicle support 30 is fixed to the planned lift portion defined in the lower part of the vehicle 1. Can be fixed easily.

  (g) The arm lock means 40 enables the first stop 41A provided to be able to advance and retreat in the second sub-link 25S and the first engagement element 41B fixed to the first sub-link 24S to engage with each other. At the same time, the second stop 42A provided so as to be able to advance and retreat in the second sub-link 25S and the second engagement element 42B fixedly provided in the intermediate link 23 can be engaged with each other, and provided in the second sub-link 25S. The lock operating portion 43 causes the first stop 41A to engage with the first engagement element 41B, and causes the second stop 42A to engage with the second engagement element 42B, thereby freeing the first parallelogram link mechanism L1. And the free displacement of the second parallelogram link mechanism L2 can be locked simultaneously. As a result, with a compact structure, the free movement of the first parallelogram link mechanism L1 and the second parallelogram link mechanism L2 can be easily and simultaneously locked regardless of the swing position of the swing arm 20. . Further, the simple displacement of the first parallelogram link mechanism L1 and the second parallelogram link mechanism L2 can be simplified simultaneously by a simple operation such as rotating the cam surface 43A by the single lock operation portion 43. Can lock.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, in the vehicle lift device 100 of the present invention, the vehicle support 30 (60) provided on the tip link 22 (52) of the link connector 20A (50A) constituting the swing arm 20 (50) is provided. It may consist of a money receiving which contacts the lift point defined at the lower part of the vehicle 1 from below. Since the vehicle lift device 100 of the present invention can be positioned by inserting the vehicle receiver 30 (60) into the lower portion of the vehicle 1 even in a vehicle having a low vehicle height and a wide vehicle width, the receipt of the vehicle receiver 30 (60) is possible. Can be reliably and easily positioned at the lower lift point of the vehicle 1 and lifted up.

  Moreover, in this invention, the link coupling body which comprises a swing arm is not necessarily limited to what consists of a parallelogram link mechanism.

  In the present invention, the link connecting body constituting the swing arm can also have other arm lock means other than the arm lock means for locking the parallelogram link mechanism.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle lift apparatus which can be easily inserted in a lower part of a low floor vehicle with a light operation force can be provided. In the vehicle lift device, the swing arm provided with the vehicle support can be downsized. Further, in the vehicle lift device, the swing arm provided with the vehicle support can be easily and reliably locked.

DESCRIPTION OF SYMBOLS 1 Vehicle 2F, 2R Tire 10 Lifting stand 11 Lifting stand 20, 50 Swing arm 20A, 50A Link connection body 21, 51 Base link 22, 52 End link 23, 53 Intermediate link 24, 54 First link 25, 55 First 2 links 24S, 54S 1st sublinks 25S, 55S 2nd sublinks 30, 60 Vehicle receivers 31F, 31R, 61F, 61R Front and rear levers 40, 70 Arm locking means 41A First stop 41B First engagement element 42A First 2 stop 42B 2nd engagement element 43 lock operation part 100 lift device L1 1st parallelogram link mechanism L2 2nd parallelogram link mechanism

Claims (6)

A pair of left and right lifting platforms installed on the left and right of the maintenance workshop of the target vehicle;
In the vehicle lift device, which is supported at each of the two front and rear positions of the lifting platform included in each lifting platform and has a pair of front and rear swing arms that can be lifted and lowered together with the lifting platform,
Each swing arm
It consists of a link connection body that connects a plurality of links, the base link that constitutes the link connection body is fixed to the lifting platform of the lifting platform, and the distal end link that constitutes the link connection body includes a vehicle support ,
The link connector is
It consists of 7 links of base link, tip link, intermediate link, first link, second link, first sublink and second sublink, and the length of each link of base link, tip link and intermediate link , The lengths of the links of the first link and the first sublink are the same, the lengths of the links of the second link and the second sublink are the same,
The base link, the first link, the intermediate link, and the first sublink are connected to form a first parallelogram link mechanism, and the intermediate link, the second link, the tip link, and the second sublink. Are connected so as to form a second parallelogram link mechanism . The link connector is
And free displacement of the first parallelogram link mechanism, the vehicle lift system according to claim 1 comprising an arm lock means for locking simultaneously the free displacement of the second parallelogram linkage. The arm locking means is
While enabling the 1st stop provided in the 2nd sublink so that advancement / retraction was possible, and the 1st engagement element fixedly provided in the 1st sublink,
The second stationary member provided in the second sub-link so as to be able to advance and retreat and the second engaging member provided fixedly in the intermediate link can be engaged with each other,
The first stop is engaged with the first engagement element and the second retention element is engaged with the second engagement element, and the first parallelogram link mechanism of the first parallelogram link mechanism is engaged. The vehicle lift device according to claim 2 , wherein the free displacement and the free displacement of the second parallelogram link mechanism can be locked simultaneously. The distal end link of the link connector is displaceable only in the longitudinal direction and the vehicle width direction of the vehicle,
By displacing the front end link in the vehicle width direction from the outside of the vehicle, the planned lift portion is inserted into the lower portion of the tire from the side of the lower portion of the tire of the vehicle and is located at two positions in the front and rear of the lower portion of the tire. A vehicle receiver positioned relative to the tip link.
The vehicle holder positioned with respect to the said lift plan part touches each of two front and back two positions of the lower part of the said tire from the downward direction with the raising of the raising / lowering stand of a lifting stand, The lift of a vehicle of Claims 1-3 is possible. The vehicle lift device according to any one of the above. A vehicle holder provided at the front end link of the link coupling body is inserted into the lower portion of the tire from the side of the lower portion of the vehicle tire by displacing the front end link from the outside of the vehicle toward the vehicle width direction. It consists of front and rear levers that are positioned with respect to the lift planned portion that is two positions in the front and rear of the lower part of the tire,
Claim 1-4 The above front and rear lever positioned with respect to the lifting portion to be to allow lifting up the vehicle in contact from below to each of two positions front and rear of the lower portion of the tire with increasing elevation frame of the lifting frame The vehicle lift device according to any one of the above. 2. A vehicle holder provided at a front end link of the link connector comprises a metal receiving member that is inserted into a lower part of the vehicle from a lower side of the vehicle and comes into contact with a lift point defined at the lower part of the vehicle from below. The vehicle lift device according to any one of to 3 .

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